This video follows the attempt to build a self-exciting electric generator from iron, copper wire, and hand-forged parts. The project starts with the limits of chemical batteries and moves into the ...

Sometimes we build to innovate, and sometimes we build just to have the satisfaction of saying we made it ourselves. Yet there is another reason to construct something ourselves: To learn, just as ...

The theory behind hydropower is very simple: water obeys gravity and imparts the gained kinetic energy onto a turbine, which subsequently drives a generator. The devil here is, of course, in all the ...